reeve



JAIiZES H. REEVE, F SALT LAKE CITY},

PEDCESS' 0F RECG'VEBING POTASSIUM SALTS SHEEN?) GOHQTAZIJKNG- THE SAME.

ms Specification of letters Peiwt 2 N0 Drawing. Application filed September 26, 1912?. Serial No. -51848. To ail whom it may concern. chiorid.v The mother liquor is now sepae it known that I, JABIES H. Ruum, a rated from these precipitated salts, and has citizen of the United States, residing at Salt a gravity of 37 to 38 Bennie, cold, and LakeCity, in the county of S'a lt Lake and consists of an almost pure solution of meg 5 State of Utah, have invented certain new nesium'chiorid. which can be employed iii a so and useful Improvements in Processes of subsequent step of the process, if desired.

eoovering Potassium Salts from Saline The low grade potassium suits, obtained Mixtures Containing the Same, of Which in the preceding second step, which Belts the following is e specification. contain approximately twenty per poso My invention relates to improvements in tassium chlorid, are then digested in a 36 to processes of recovering potassium salts from 8 Beum solution of magnesium ohiorid,

saline mixtures containing the some. at a temperature ofllo" (1, which is be An important object of my invention is heath the boiling point of the solut ion for to recover and refine low grade potassium a period ofseverel hours, until the potasl5 salts into oommeroieiiy pure potassium eh'iosium salts, formeriy in the low grade mi 6 rid, at an economical cost. .ture of the some have dissolved in. the mag he pr ent invention is eppiieeble to any nesium chlorid liquor. The 'inixture of saline mixture containing Water-soluble oliquor and crystals is thoroughly agitated tessium-salts, and is particularly epplica, ie during the entire period of digestion. The 20 to the refining, purifying, or recovery of mognesiumehiorid liqfior,st theehove stated commercially pure potassium salts from low eumzinc-'1 temperature, dissolve about two potassium salts, suoh as are roueed peroentofits Weightofpotessiumchlorid,but

from the Waters of Great-Selt- Luke. Eves not dissoive oftheotherseits present. n accordance with the practice of my 1 have found that fifty pounds of magne- "o v in its preferred form, the Water from sium ohiorid liquor should be used for eoeh 50 Salt Lake, which contains a large perone pound of potassium ohiorid, to re- '1 of sodium ohiorid with small percovered. The -iquor which now contains centages potassium ohlorid and magne the potassium Cilifiliii' in solution, is sepasiuzn ohlorid and sulfate, is transferred into rated While hot, from'the uodissolred crys- EU suitebiecontainers and evaporated by solar teis of magnesium sulfate and sodium or artificial mes-us, until it is saturated in ohiorid. aspect to its potassium content. During The hot liquor obtained, from the pieced his step, the Water has deposited the me ing step, is then cooled to 420 {1, or lower. riuy ofits sodium ohiorid content. The causing the potassium ohiorid contained 'uor stzhis point has a gravity of from therein, to be precipitated the double so 3-ito 35' Bennie, eoid, 2130i has the 501- of potassium magnesium chior T Y .l

owing epproxiiruite composition: double seit oomm re '1 7 I l 615.86% Louie The mot F magnesium chi-one so. from the oe' u subsets."

is ed ii-fer and 1. "i,

m Alllb a. it, erated liroio the salts composes the den step. and this iquor taking up nesium,

chlorid, separating the liquor which contains allowing the solution thus separated to cool, whereby the potassium ta-ted as a double salt of potassium and magdigesting these double salts with cold water to remove the magnesium the magnesium chlorid from the resultant potassium chlorid crystals, adding this liquor to the 36 to 37 Baum magnesium chlorid solution used inthe hot digestion step of the next cycle and again precipitating the unrecovered potassium chlorid as carnallite, removing the magnesium chlorid .from the carnallite and recovering the potassium salts as high grade potassium chlorid.

7. The herein described process of re covering potassium salts from saline mixohlorid is precipi tures, which consists in digesting a mixture containing potassium carbonate, sulfate, nitrate or borate and other salts, in a hot magnesium chlorid solution to convert the potassium into soluble potassium chlorid and the carbonate, sulfate, nitrate or borate into the insoluble magnesium salt of same; separating the hot liquor from the insoluble salts, cooling this l'quor to obtain carnallite, and recovering the potassium chlorid from same as a high grade product.

In testimony whereof I affix my' signature in presence of two Witnesses. JAMES H. REEVE. Witnesses:

R. NELSON, R, L. RIGGS. 

